UCC28C40DR Integrated Circuits (ICs)

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UCC28C40DR is a power management IC (PMIC) that helps manage voltage levels and is part of a family of DC-DC switching controllers from Texas Instruments. It is specifically designed for use as a synchronous rectifier controller and includes a Pulse Width Modulator (PWM) and a variety of low voltage protection functions for lithium ion battery − powered systems and other low power applications.

The UCC28C40DR was designed to provide excellent primary and secondary side adjustment range and min pulse width of repeatable pulse and minimize timing sensitivity. It features a common P-channel synchronous rectification controller with power MOSFET gate drivers that can efficiently regulate the load while minimizing losses in the system. The UCC28C40DR also includes functional protection including undervoltage phase lock loop synchronization, undervoltage lockout, overcurrent blanking, and overtemperature with adjustable temperature cutoffs.

In terms of application field and working principle, the UCC28C40DR is used in a variety of power systems, such as on-board chargers for cell phones, enterprise-level PDAs, portable audio players, and other battery-powered systems. The UCC28C40DR enables power conversion from battery power or an AC adapter to DC and also provides 5V-buck regulator output, MOSFET gate drivers, and primary and secondary side adjustment.

In a typical application, the UCC28C40DR works together with other power components, such as a voltage step-down regulator, P-channel MOSFETs, and output diode. The UCC28C40DR IC serves as an excellent primary switch controller, providing PWM control to the MOSFETs. The controller drives the MOSFETs in synchronous rectification mode to provide efficient power conversion.

Moreover, the UCC28C40DR features overcurrent and overtemperature protection. Its advanced protection circuitry includes a current sense circuit and temperature sensors, which shrink when the IC is too hot, to directly control the switching current and provide some level of overcurrent protection.

In conclusion, the UCC28C40DR is a powerful low power PMIC from Texas Instruments. It covers a wide range of applications such as on-board chargers for cell phones, PDAs, audio players, and other battery-powered systems. It offers advanced protection for voltage step-down regulators, P-channel MOSFETs, and output diodes, along with synchronous rectification to effectively convert battery power or AC adapters to DC.

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